BEDFORD, MA, JANUARY 3, 2011 - Acme Packet® (NASDAQ:APKT, news, filings), the leader in session border control solutions, today announced that it will release financial results for the fourth quarter of 2010 on Tuesday, February 1, 2011 after the market closes. The Company’s management team plans to host a live conference call and webcast at 4:30 p.m. eastern standard time on that day to discuss the financial results as well as management’s outlook for the business. The conference call may be accessed in the United States by dialing (800) 230-1951 and using access code “APKT”. The conference call may be accessed outside of the United States by dialing +1 612.332.0226 and using access code “APKT”. The conference call will be simultaneously webcast on the Company’s investor relations website, which can be accessed at www.ir.acmepacket.com. A replay of the conference call will be available approximately two hours after the call by dialing (800) 475-6701 and using access code 186975 or by accessing the webcast replay on the Company’s investor relations website.About Acme Packet

Acme Packet, Inc. (NASDAQ: APKT), the leader in session border control solutions, enables the delivery of trusted, first-class interactive communications--voice, video and multimedia sessions--and data services across IP network borders. Our Net-Net family of session border controllers, multiservice security gateways and session routing proxies supports multiple applications in service provider, enterprise and contact center networks--from VoIP trunking to hosted enterprise and residential services to fixed-mobile convergence. They satisfy critical security, service assurance and regulatory requirements in wireline, cable and wireless networks; and support multiple protocols--SIP, H.323, MGCP/NCS, H.248 and RTSP--and multiple border points--service provider access and interconnect, and enterprise access and trunking. Over 10,000 Acme Packet systems have been deployed by more than 1,105 customers in 105 countries. They include 91 of the top 100 service providers in the world and 11 of the Fortune 25. For more information, contact us at +1 781.328.4400, or visit www.acmepacket.com.